CN104888573A - Device and method for promoting aggregation and growth of fine particulate matters - Google Patents
Device and method for promoting aggregation and growth of fine particulate matters Download PDFInfo
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- CN104888573A CN104888573A CN201510278522.2A CN201510278522A CN104888573A CN 104888573 A CN104888573 A CN 104888573A CN 201510278522 A CN201510278522 A CN 201510278522A CN 104888573 A CN104888573 A CN 104888573A
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Abstract
The invention relates to a device and method for promoting aggregation and growth of fine particulate matters. The device comprises a shell with two open ends, wherein the two open ends of the shell are used as an air flow inlet and an air flow outlet respectively, multiple baffles in parallel to the coming flow are fixedly connected to the inner wall of the shell at intervals; the inside of the shell is divided into multiple parallel sub channels through the baffles; multiple sets of spoiler blade rows are arranged at intervals in the direction of the coming flow in each sub channel; each set of spoiler blade rows comprises multiple spoiler blades which are arranged at intervals in a direction perpendicular to the direction of the coming flow.
Description
Technical field
The present invention relates to a kind of device and method promoting fine particle agglomeration, belong to technical field of environment protection equipment.
Background technology
The flue dust that industrial combustion produces is the main source of fine particle in air, and coal-fired power station boiler is wherein one of most important contributor.Due to micron particularly Submicron Particles easily sucked by human body and be enriched with cytotoxic compound, countries in the world government has formulated and has constantly updated tough laws standard, controls diameter and is less than the discharge of particle (PM10) to air of 10 microns.Consider the harm to human body, national governments' special concern kinetic diameter is less than or equal to the discharge of the particle of 2.5 microns (or claiming PM2.5).Except directly damaging human body, subparticle is also one of major air pollutants causing atmospheric visibility low.The opacity of air depends primarily on the number of fine particle in emission, because reach peak value when the extinction coefficient of light is near wavelength is close to 0.1 μm and 1.0 μm.
In the industrial production, various different dust collection method and device are used to remove in air-flow the flying dust or particle that carry.But generally speaking, these dust arresters all have significant limitation for interception PM2.5.As electrostatic precipitator, be well suited for larger particle to remove from air-flow, but quite low for the filter efficiency of PM2.5 and more tiny Submicron Particles.And for example sack cleaner, under the condition constantly increasing the cloth bag number of plies, effectively can tackle PM2.5, but also constantly add the resistance of flue simultaneously, bag-type dust collector also needs regular deashing in addition, and very easily sticks with paste bag for the flue gas that humidity is higher.Along with Particulate Pollution discharge standard in combustion product gases is more and more stricter, the dust collection capacity of original dust arrester reaches the limit, cannot reach discharge standard under causing many situations.Therefore, under the requirement of the ultralow even ultra-clean discharge of the combustion product gases of current pursuit coal-burning boiler, need a kind of dust arrester of high efficiency, low cost badly.
Summary of the invention
For the problems referred to above, an object of the present invention is to provide a kind of device promoting fine particle agglomeration.
For achieving the above object, the present invention is by the following technical solutions: a kind of device promoting fine particle agglomeration, it is characterized in that: it comprises the housing of an open at both ends, the both ends open of described housing is respectively as airflow inlet and air stream outlet, multiple dividing plate parallel with incoming flow is fixedly connected with at the inwall interval of described housing, the interior separation of described housing is become multiple subchannel be parallel to each other by each described dividing plate, be provided with many groups in subchannel described in each and flow to spaced apart turbulence blades row along incoming flow, each is organized described turbulence blades package and draws together multiple edge perpendicular to carrying out the spaced apart turbulence blades of flow path direction.
The each group of described turbulence blades row being positioned at each subchannel is distributed in the same side of described subchannel.
The each group of described turbulence blades row being positioned at each subchannel is interspersed in the both sides of described subchannel.
Air flow outlet near described housing is provided with multiple current-sharing blade.
Described current-sharing blade adopts symmetrical aerofoil blade.
Described turbulence blades is one or more combinations in triangle, tile shape, wedge shape, rhombus, serpentine, " Z " shape, rectangle, ellipse and streamlined.
Another object of the present invention is to provide a kind of method promoting fine particle agglomeration.
For achieving the above object, the present invention is by the following technical solutions: a kind of method promoting fine particle agglomeration, comprise the following steps: 1) be arranged in parallel multiple dividing plate in the housing that is the tubular of open at both ends, enclosure interior space is separated into multiple subchannel by each dividing plate, be arranged at intervals with in the one or both sides of each subchannel organize turbulence blades more along carrying out flow path direction, each is organized turbulence blades package and draws together multiple edge perpendicular to carrying out the spaced apart turbulence blades of flow path direction, 2) incoming flow is imported into each subchannel after the airflow inlet of housing, the incoming flow carrying powder dust particle being imported into each subchannel flows through turbulence blades, whirlpool can be produced in the upstream of each turbulence blades, downstream can produce recirculating zone and whirlpool, therefore each subchannel will have swirling fluid group and the recirculating zone of huge amount, tiny particle entrainments by these swirling fluid group and recirculating zone, carrying secretly wherein flows together skims over dividing plate wall and the back side, turbulence blades downstream, these solid wall surfaces are formed the flow boundary layer that a large amount of fine particle thing exists, to substantially increase between fine particle thing and they and dividing plate wall, the interactional chance of generation at the turbulence blades back side, extremely important is that to close on the flowing velocity of wall almost nil, make tiny Submicron Particles in liquid bridge power, electrostatic force, the lower rapid adsorption of the effect such as pattern ylid Chuihua molecule power is at solid wall surface, mutually be gathered into block, until come off by the effect of astable flow disturbance and external vibrations, finally entrainmented to carry by air-flow with the form of " bulky grain " or " bulk " and depart from device of the present invention, 3) be difficult to be entrainmented by the backflow in the whirlpool of blade upstream and downstream and downstream, the back side by the bulky grain of upstream flow to turbulence blades, bulky grain will directly pass through whirlpool group and wake zone, add between bulky grain and subparticle and interactional chance occur, make fine Submicron Particles electrostatic force, pattern ylid Chuihua molecule power to stick to rapidly under the effect of liquid bridge power on larger particles and together with to be carried by air-flow and transport disengaging said apparatus to downstream.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the present invention is owing to being provided with multiple dividing plate be parallel to each other in the housing, housing is separated into multiple passage by dividing plate, many group turbulence blades rows are provided with in each passage, therefore backflow and the vortex district of varying strength is manufactured in the gas flow at each turbulence blades, it is made to carry fine particle thing and solid wall surface making contact, adsorpting aggregation growing up comes off, make that the particle that carries in air-flow is easier to be filtered thereafter or otherwise to remove, the present invention is especially effective for superfine particulate matter.2, the placed angle of turbulence blades of the present invention, shape, size and position relationship each other can according to user to channel pressure loss and improve the requirement of downstream dust arrester efficiency, incoming flow dust concentration, domain size distribution change and to adjust and optimization is determined, therefore, there is different hydrodynamic characteristics, to adapt to the needs of different purposes in industry, there is very strong controllability.3, before apparatus of the present invention are generally arranged on the existing dust arrester in industrial process downstream, can not only help to remove superfine particulate matter efficiently, and operator can be made need not to change the working procedure of original dust arrester, solve the problem of a series of working procedure changes brought after such as electrostatic precipitator being replaced with bag-type dust collector.4, structure of the present invention is simple, easy to operate, not only can be applied in the industrial combustion fume emission dust removal process that particularly boiler of power plant burns, and can be used for that bulk material transports, in all dedusting industry of whipping process, object greatly improves the ability of original dust arrester interception fine particle PM2.5, reduces the smoke dust discharge concentration of more than 50-90% at different conditions.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is the structural representation of turbulence blades of the present invention;
Fig. 3 is the structural representation of current-sharing blade of the present invention;
Fig. 4 is the flow schematic diagram in subchannel of the present invention;
Fig. 5 is air-flow and the aerodynamics motion schematic diagram of particle under blade effect.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
The present invention proposes a kind of device promoting fine particle agglomeration, as shown in Figure 1, it comprises the housing 1 of an open at both ends, the both ends open of housing 1 is respectively as airflow inlet and air stream outlet, multiple dividing plate 2 parallel with incoming flow is fixedly connected with at the inwall interval of housing 1, the interior separation of housing 1 is become multiple subchannel 3 be parallel to each other by each dividing plate 2, 4 are arranged along carrying out flow path direction turbulence blades spaced apart in many groups that is provided with of the one or both sides of each subchannel 3, each group turbulence blades package draws together multiple edge perpendicular to carrying out the spaced apart turbulence blades 5 of flow path direction.
In a preferred embodiment, when turbulence blades row 4 is arranged on the both sides of subchannel 3, the turbulence blades row 4 being positioned at subchannel 3 side arranges 4 in interlaced arrangement with the turbulence blades being positioned at subchannel 3 opposite side.
In a preferred embodiment, air flow outlet near housing 1 is provided with multiple current-sharing blade 6, each current-sharing blade 6 can adopt symmetrical aerofoil blade (as shown in Figure 2), and the object arranging current-sharing blade 6 is that to make to carry the air-flow of dust even at exit flow velocity.
In a preferred embodiment, turbulence blades 5 is one or more combinations in triangle, tile shape, wedge shape, rhombus, serpentine (as shown in Figure 3), " Z " shape, rectangle, ellipse and streamlined; The edge shape of turbulence blades 5 can be the straight flange of rule or single groove zigzag, also can be irregular many grooves zigzag.
The invention allows for a kind of method promoting fine particle agglomeration, comprise the following steps:
1) be arranged in parallel multiple dividing plate 2 in the housing 1 that is the tubular of open at both ends, enclosure interior space is separated into multiple subchannel 3 by each dividing plate, be arranged at intervals with many group turbulence blades rows 4 in the one or both sides of each subchannel 3 along carrying out flow path direction, each group turbulence blades row 4 comprises multiple edge perpendicular to carrying out the spaced apart turbulence blades 5 of flow path direction.
2) incoming flow is imported into each subchannel 3 after the airflow inlet of housing 1, as Fig. 4, shown in Fig. 5, the incoming flow carrying powder dust particle being imported into each subchannel 3 flows through turbulence blades 5, whirlpool 7 can be produced in the upstream of each turbulence blades 5, downstream can produce recirculating zone 8 and whirlpool 7, so, each subchannel 3 will have swirling fluid group and the recirculating zone 8 of huge amount, tiny particle entrainments by they, carrying secretly wherein flows together skims over dividing plate 2 wall and the back side, turbulence blades 5 downstream, these solid wall surfaces are formed the flow boundary layer that a large amount of fine particle thing exists, to substantially increase between fine particle thing and they and dividing plate 2 wall, the interactional chance of generation at turbulence blades 5 back side, extremely important is that to close on the flowing velocity of wall almost nil, make tiny Submicron Particles in liquid bridge power, electrostatic force, the lower rapid adsorption of the effect such as pattern ylid Chuihua molecule power is at solid wall surface, mutually be gathered into block, until come off by the effect of astable flow disturbance and external vibrations, finally entrainmented to carry by air-flow with the form of " bulky grain " or " bulk " and depart from device of the present invention, external flow disturbance comprises upstream incoming flow and passes through the brute force attack refluxed in the slot jet impingement and downstream wake formed between turbulence blades 5.
3) as shown in Figure 5, be difficult to be entrainmented by the backflow in the whirlpool of blade upstream and downstream and downstream, the back side by the bulky grain of upstream flow to turbulence blades, bulky grain will directly pass through whirlpool group and wake zone, add between bulky grain and subparticle and interactional chance occurs, make fine Submicron Particles at electrostatic force, pattern ylid Chuihua molecule power (when flue-gas temperature is more than 100 DEG C during normal pressure) or in liquid bridge power, electrostatic force, to stick to rapidly under the effect of pattern ylid Chuihua molecule power (when flue-gas temperature is below 100 DEG C during normal pressure) on larger particles and carried by air-flow together and transport disengaging said apparatus to downstream.
In sum, use device and method of the present invention that most fine particle in flue gas can be made self to grow up into block by contacting with solid wall surface, then coming off by External Force Acting, also many fine particles can be made to be adsorbed on large particle surface become a latter's part and move toward downstream thereupon, thus coordinate downstream cleaner at the original fine particle trapped or also eliminate together while tackling original bulky grain thing in flue gas.
In said process, occurring between variable grain interacts refers to particle collision, contact or lean on enough near and cause absorption, condensation, catalysis and the even multiple effect such as chemical reaction; Particle and the effect of solid wall surface refer to that particle collides, contacts or lean on enough near and fine particle that is that cause adsorbs, is agglomerated on the surface of solids.
In industry, particle in flue is in transport process, resistance during flow of flue gas or pressure drop the smaller the better, and the speed of incoming flow of device upstream air-flow of the present invention can change along with the change of the power of upstream equipment (such as power-equipment, smelting equipment etc.).Therefore, if adopt uncontrollable powder particle processing device, its pressure loss of air-flow process and efficiency of dust collection cannot equilibrate to the best.Apparatus of the present invention can according to the change of upstream equipment power, the flow velocity of Incoming gas and direction etc. carry out adjusting (adjusting the shape, size, placed angle, spacing distance etc. of turbulence blades 5 thus the whirlpool size, recirculating zone yardstick etc. of adjustment generation), make the on-road efficiency optimum state of powder particle processing device.
The present invention is only described with above-described embodiment; the structure of each parts, setting position and connection thereof all can change to some extent; on the basis of technical solution of the present invention; all improvement of carrying out individual part according to the principle of the invention and equivalents, all should not get rid of outside protection scope of the present invention.
Claims (7)
1. one kind promotes the device of fine particle agglomeration, it is characterized in that: it comprises the housing of an open at both ends, the both ends open of described housing is respectively as airflow inlet and air stream outlet, multiple dividing plate parallel with incoming flow is fixedly connected with at the inwall interval of described housing, the interior separation of described housing is become multiple subchannel be parallel to each other by each described dividing plate, be provided with many groups in subchannel described in each and flow to spaced apart turbulence blades row along incoming flow, each is organized described turbulence blades package and draws together multiple edge perpendicular to carrying out the spaced apart turbulence blades of flow path direction.
2. a kind of device promoting fine particle agglomeration as claimed in claim 1, is characterized in that: each group of described turbulence blades row being positioned at each subchannel is distributed in the same side of described subchannel.
3. a kind of device promoting fine particle agglomeration as claimed in claim 1, is characterized in that: each group of described turbulence blades row being positioned at each subchannel is interspersed in the both sides of described subchannel.
4. a kind of device promoting fine particle agglomeration as described in claim 1 or 2 or 3, is characterized in that: the air flow outlet near described housing is provided with multiple current-sharing blade.
5. a kind of device promoting fine particle agglomeration as claimed in claim 4, is characterized in that: described current-sharing blade adopts symmetrical aerofoil blade.
6. a kind of device promoting fine particle agglomeration as described in claim 1 or 2 or 3, is characterized in that: described turbulence blades is one or more combinations in triangle, tile shape, wedge shape, rhombus, serpentine, " Z " shape, rectangle, ellipse and streamlined.
7. promote a method for fine particle agglomeration, comprise the following steps:
1) be arranged in parallel multiple dividing plate in the housing that is the tubular of open at both ends, enclosure interior space is separated into multiple subchannel by each dividing plate, be arranged at intervals with in the one or both sides of each subchannel organize turbulence blades more along carrying out flow path direction, each is organized turbulence blades package and draws together multiple edge perpendicular to carrying out the spaced apart turbulence blades of flow path direction;
2) incoming flow is imported into each subchannel after the airflow inlet of housing, the incoming flow carrying powder dust particle being imported into each subchannel flows through turbulence blades, whirlpool can be produced in the upstream of each turbulence blades, downstream can produce recirculating zone and whirlpool, therefore each subchannel will have swirling fluid group and the recirculating zone of huge amount, tiny particle entrainments by these swirling fluid group and recirculating zone, carrying secretly wherein flows together skims over dividing plate wall and the back side, turbulence blades downstream, these solid wall surfaces are formed the flow boundary layer that a large amount of fine particle thing exists, to substantially increase between fine particle thing and they and dividing plate wall, the interactional chance of generation at the turbulence blades back side, extremely important is that to close on the flowing velocity of wall almost nil, make tiny Submicron Particles in liquid bridge power, electrostatic force, the lower rapid adsorption of the effect such as pattern ylid Chuihua molecule power is at solid wall surface, mutually be gathered into block, until come off by the effect of astable flow disturbance and external vibrations, finally entrainmented to carry by air-flow with the form of " bulky grain " or " bulk " and depart from device of the present invention,
3) be difficult to be entrainmented by the backflow in the whirlpool of blade upstream and downstream and downstream, the back side by the bulky grain of upstream flow to turbulence blades, bulky grain will directly pass through whirlpool group and wake zone, add between bulky grain and subparticle and interactional chance occur, make fine Submicron Particles electrostatic force, pattern ylid Chuihua molecule power to stick to rapidly under the effect of liquid bridge power on larger particles and together with to be carried by air-flow and transport disengaging said apparatus to downstream.
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| CN201510278522.2A CN104888573B (en) | 2015-05-27 | 2015-05-27 | Device and method for promoting aggregation and growth of fine particulate matters |
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| CN201510278522.2A CN104888573B (en) | 2015-05-27 | 2015-05-27 | Device and method for promoting aggregation and growth of fine particulate matters |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105855045A (en) * | 2016-05-20 | 2016-08-17 | 武汉大学 | Ultrafine particle coagulating device adopting adjustable vortex production by means of turbulence |
| CN106512633A (en) * | 2016-12-19 | 2017-03-22 | 青岛大学 | Turbulent flow and chemical agglomeration coupling fine particle agglomeration device |
| CN106966173A (en) * | 2017-06-02 | 2017-07-21 | 江苏理工学院 | A kind of autoexcitation air particles conveying device |
| CN107854949A (en) * | 2017-12-14 | 2018-03-30 | 俞小林 | A kind of poly- dirt facility of electrostatic |
| CN108067473A (en) * | 2016-11-11 | 2018-05-25 | 丰田自动车株式会社 | Bleed type cleaning device |
| CN109364678A (en) * | 2018-12-26 | 2019-02-22 | 宁波大红鹰学院 | A kind of device for promoting superfine particulate matter in coal-fired flue-gas to reunite |
| CN110538518A (en) * | 2018-05-29 | 2019-12-06 | 北京大学 | Device and method for promoting combined removal of micro-dust and mercury in airflow |
| CN112843973A (en) * | 2021-03-03 | 2021-05-28 | 武汉利康能源有限公司 | Fine dust coalescence device |
| CN112973368A (en) * | 2021-03-03 | 2021-06-18 | 武汉利康能源有限公司 | Dust-containing airflow rectifying and stabilizing device |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105855045A (en) * | 2016-05-20 | 2016-08-17 | 武汉大学 | Ultrafine particle coagulating device adopting adjustable vortex production by means of turbulence |
| CN108067473A (en) * | 2016-11-11 | 2018-05-25 | 丰田自动车株式会社 | Bleed type cleaning device |
| CN106512633A (en) * | 2016-12-19 | 2017-03-22 | 青岛大学 | Turbulent flow and chemical agglomeration coupling fine particle agglomeration device |
| CN106512633B (en) * | 2016-12-19 | 2019-07-30 | 青岛大学 | Turbulent flow and chemical agglomeration couple fine grained agglomeration device |
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| CN109364678A (en) * | 2018-12-26 | 2019-02-22 | 宁波大红鹰学院 | A kind of device for promoting superfine particulate matter in coal-fired flue-gas to reunite |
| CN109364678B (en) * | 2018-12-26 | 2021-06-25 | 宁波大红鹰学院 | Device for promoting agglomeration of ultrafine particles in coal-fired flue gas |
| CN112843973A (en) * | 2021-03-03 | 2021-05-28 | 武汉利康能源有限公司 | Fine dust coalescence device |
| CN112973368A (en) * | 2021-03-03 | 2021-06-18 | 武汉利康能源有限公司 | Dust-containing airflow rectifying and stabilizing device |
| CN112973368B (en) * | 2021-03-03 | 2024-05-24 | 武汉利康能源有限公司 | Dust-containing airflow rectifying and stabilizing device |
| CN112843973B (en) * | 2021-03-03 | 2024-06-11 | 武汉利康能源有限公司 | Dust particle coalescence device |
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